Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...
Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...
Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...
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The orig<strong>in</strong>al Insituform l<strong>in</strong>er <strong>in</strong>stalled <strong>in</strong> the Brick Lane Sewer was exam<strong>in</strong>ed <strong>in</strong> June 1991 and two<br />
sample panels were removed from the l<strong>in</strong><strong>in</strong>g by Insituform Permal<strong>in</strong>e, Ltd., and placed <strong>in</strong> the custody <strong>of</strong><br />
MTS Pendar, Ltd., under the scrut<strong>in</strong>y <strong>of</strong> TW. The panels were cut from the sidewall <strong>of</strong> the l<strong>in</strong>er along the<br />
spr<strong>in</strong>g l<strong>in</strong>e <strong>of</strong> the sewer about 3 ft (900 mm) from the access manhole located <strong>in</strong> Riverside Close. The<br />
location was revisited <strong>in</strong> October 2001 and two sample panels about 1 foot (300 mm) square were<br />
removed from an area <strong>of</strong> the sidewall about 6 ft (1.83 m) <strong>in</strong>to the sewer (Figure C-1). The second set <strong>of</strong><br />
samples was placed <strong>in</strong> the custody <strong>of</strong> Bodycote Materials Test<strong>in</strong>g, Ltd. (owners <strong>of</strong> MTS Pendar). In each<br />
<strong>in</strong>stance, test pieces were mach<strong>in</strong>ed from the test panels and tested for flexural strength and modulus <strong>in</strong><br />
accordance with the relevant test<strong>in</strong>g specifications: BS 2782 Part 3 Method 335A:1978 <strong>in</strong> 1991 and<br />
U.K.WIS 4-34-04/BS EN ISO 178 <strong>in</strong> 2001. The results <strong>of</strong> this retrospective evaluation spann<strong>in</strong>g 20 to 30<br />
years after the orig<strong>in</strong>al CIPP <strong>in</strong>stallation are summarized <strong>in</strong> Table C-1.<br />
Figure C-1. Sample Retrieval at the Brick Lane Sewer CIPP Project <strong>in</strong> Hackney, U.K.<br />
Table C-1. Results <strong>of</strong> Brick Lane Sewer CIPP <strong>Retrospective</strong> Test<strong>in</strong>g<br />
Sample Mean Industry Standard<br />
Flexural Property 20 Year 30 Year WIS4-34-04 ASTM F1216<br />
Modulus, MPa 2,900 3,300 2,200 -<br />
Modulus, psi 420,000 480,000 - 250,000<br />
Strength, MPa 46 43 25 -<br />
Strength, psi 6,700 6,200 - 4,500<br />
C-2